TNY278P

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TNY278P is a highly integrated offline switcher with built-in auto-restart and power management functions for low-power applications.

  • 製造商零件號 # : TNY278P

  • 包裝/封裝: DIP

  • 製造商: Power Integrations

  • 產品分類 : Switching Regulator or Controllers

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TNY278P 數據表

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詳細說明

TNY278P is a highly integrated off-line switcher IC (Integrated Circuit) that incorporates a 725 V power MOSFET, oscillator, high voltage switched current source, current limit and thermal shutdown circuitry. It is specifically designed for offline switch mode power supplies in consumer electronics, industrial controls, LED lighting, and other applications where power efficiency and reliability are important.The TNY278P operates in a flyback topology and provides up to 6.5 W of output power with high efficiency and low standby power consumption. It features a jittered switching frequency to reduce EMI (Electromagnetic Interference) emissions, as well as auto-restart protection in case of a fault condition.This IC requires minimal external components for operation, reducing the overall BOM (Bill of Materials) cost and PCB (Printed Circuit Board) footprint. It also incorporates built-in features such as line undervoltage lockout, hysteretic thermal shutdown, and accurate current limiting to ensure safe and reliable operation.

主要特徵

  • Low-cost off-line switcher IC
  • Integrated 700 V MOSFET
  • Output power up to 14 W
  • Efficiency up to 84%
  • Low standby power consumption
  • Integrated auto-restart, output overvoltage protection
  • Frequency jittering reduces EMI
  • Accurate externally set current limit
  • Internal thermal shutdown protection

應用

  • Chargers for mobile devices
  • USB power supplies
  • Set-top boxes
  • Networking equipment
  • LED lighting

規格

以下是所選零件的基本參數,涉及零件的特性及其所屬類別。

Manufacturer Artesyn Product Category ! AC DC Converters, Offline Switchers

數據表 PDF

數據表記錄了器件的特性、絕對最大額定值、應用等,這對於作為器件特定應用的整體指南大有裨益。

初步規格 TNY278P PDF 下載

常見問題解答

What is TNY278P?

The TNY278P is a member of the TinySwitch-III family of energy-efficient off-line switcher ICs designed by Power Integrations. It is ideal for low power AC-DC power supplies, adapters, and chargers for applications such as home appliances, lighting, and consumer electronics.

How Does TNY278P Work?

The TNY278P incorporates a high-voltage power MOSFET with control and protection circuits into a monolithic device. It operates by converting AC input voltage to a well-regulated DC output with high efficiency and low standby power consumption. The integrated circuit implements primary side regulation, eliminating the need for optocouplers and secondary feedback circuitry.

How Many Pins does TNY278P have and What are the Functions of the Pinout Configuration?

The TNY278P is housed in an 8-pin PDIP (Plastic Dual In-line Package) or SO-8C (Small Outline 8-Lead) package. The pinout configuration includes:

  • BP/M: Bottom power MOSFET pin for drain connection or can be used as an auxiliary winding for biasing the TinySwitch-III.
  • FB: Feedback pin for connecting an optocoupler or secondary feedback components.
  • D: Drain pin for the power MOSFET used during the off time of the switching cycle.
  • EN/UV: Enable input and undervoltage lockout pin.
  • NC: No Connect pin (These pins are not connected internally and can be left unconnected or used for specific applications).
  • C: IC ground pin for return path of control circuits and power train.
  • Y: Internal FET source connection and bias return for 5th pin functions.
  • X: Internal FET source connection pins for DRAIN and LATCH/SENSE functions

What are the Pros and Cons of TNY278P?

Pros:

  • High Efficiency: Provides high energy efficiency in power conversion applications.
  • Integrated Protection: Features built-in protection functions such as overvoltage and overcurrent protection.
  • Primary Side Regulation: Eliminates the need for optocouplers and secondary feedback components, reducing component count and cost.
  • Compact Package: Available in space-saving packages for compact designs.
  • Low Standby Power Consumption: Enables power supplies to meet energy efficiency standards and reduce standby power consumption.

Cons:

  • Routing and Layout: Requires careful consideration of PCB layout and component placement for optimal performance and EMI compliance.
  • Thermal Considerations: Thermal management is important for maintaining the temperature within acceptable limits.
  • External Components: May require additional external components for specific application requirements.

Are There Any Equivalents/Alternatives to TNY278P for Recommendation?

  • Alternatives to the TNY278P include the TOPSwitch-GX family from Power Integrations and the FSDM family from Fairchild Semiconductor.
  • A potential equivalent is the TNY277P, which is another member of the TinySwitch-III family with similar features.

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